Air-valve.



V. C. WASHBURN.

AIR VALVE.

APPLICATION FILED MAY 1907.

Patented Apr. 27, 1909.

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attenua? UNITED STAQES PATENT' 'OFFICE VICTOR C. \\"ASHBURN, OF CLIFTON SPRINGS, NEW YORK.

AIR-VALVE To all 'whom it may concern:

Be it known that I, VICTOR (1. WASHBURN, of VClifton Springs, in the county of Ontario and State of New York, have invented a new and useful Improvement in Air-Valves, which improvement isfully set forth in the following specification and shown in the accom anying drawings.

T is invention relates to certain new and useful improvements in air valves, or pressure gages, for automobile tires and the like, and it has for its objects, among others, to providela simple and cheap air valve constructed' to determine a given amount of pressure pumped into the tire.

It has for a further object to )rovide a gagewhichcannot get out of order, under ordinary usage, or become inaccurate with use. It is so constructed that the indicator being set for the number of pounds pressure desired, when such pressure is obtained, no

more air canl go into the tire, but will pass out through a blow-olf opening, and thus continued pumping will not' increase the pressure in the tire. The air escaping through the blow-off opening givesA notice to the operator that the desired pressure has been reached. The construction is such that the amount of-pressure is given at the valve of the tire and not at the base of the pump, thus making all tires of a vehicle of equal firmness, which prolongs the life of a tire and insures smoother running of the machine.

The device is readily set for any desired ressure, and the parts thereof, which are Few in number, are readily assembled.

Other ob'ects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically deiined by the appended claim.

The invention is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a pligart of this specification, and in Whichigure 1 is a side elevation of the improved air valve. Fig. 2 is a substantially central longitudinal section through the same. Fig'. 3 is a view in elevation, looking substantially at right angles to Fig. 1.

Like numerals of reference indicate like parts throughout the several views.

Referring to the drawings 1 designates the body ,portion from which extends the stem 2 of usual form for the attachment of the hose Specification of Letters Patent.

Application filed May 8, 1907.

or tube from the pump in the usual manner.

Patented April 27', 1909 Serial No. 372,489.

Into the body or head 1 thereis screwed, at one end, at right angles to the stem 2, the tube 3, upon the outer end of which is swiveled in any suitable manner the head or coupling 4, interiorly threaded as seen at 5, to be screwed onto the nipple of the tire in the usual way without turnin the re.- mainder of the device. The tubuai portion 6 may be integral with the ortion 1, or not, as may be preferred. In t is instance it is shown as made separate therefrom and screwed onto a neck or boss portion 7, as seen at 8 in Fig. 2. This boss has an axial passage 9, in line'with the passage 1i) through the tube 3, and the inner end of this passage is normally closed by means of' a packing disk 11, seated against the shoulder 12 formed by the end of the boss.

Within the tubular portion 6 is a spring 13 extending within which is a stein or spindle 14 carrying at its lower end a head 15 pressing against the packing disk 11 as seen in Fig. 2. This spindle or stein passes through the axial bore 16 of a tubular member 17 screwed into the outer end of the portion 6, the outer periphery of the head portion 19 thereof being milled or roughened as seen at 20, to facilitate the adjustment'of the part 17 by turning it `as occasion may require. The part 17 carries a pointer 21 extendin longitudinally of the tubulai' portion 6 an of a length sufficient to terminate at a point substantially near the mid-length thereof, as seen in Fig. 1.

The tubular portion 6 is rovided exteriorly with a knob or projection 22, which serves as a sto for the pointer when the part 17 is turner around in either direction.

The outer periphery of the tubular part 6 is graduated or numbered as seen at 23, for pressures from to 110 pounds, increasing by tens.

The tubular part 6 is provided with a blowoil opening 24 in proximity to the seat lfor the packing disk 11, as seen in Fig. 2, so that as said disk is raised sufficiently from its seat, the air from the pump will escape through said opening.

The mode of use will be apparent'. The parts are shown in their normal osition, with the pointer set, at say 70. he tube from the puin having been attached to the stein 2, and t e head or coupling 4 screwed onto the nipple of the tire, as soon as the pressure by pumping reaches 70, the spring. 13 yields so that the air from the pump escapes through the openin 9 and blow-off opening 24, the packing dis 11 having been raised from its seat by the pressureof the air. Normally the air takes the course through the stem 2 and the passage 10 of the tube 3, to the tire through the head or coupling 4. The screwing in of the part 17 compresses the spring so that it resists the air pressure through the passage 9 according to the distance the head 1s turned into the tubular part 6, this being indicated by the pointer 21. If thev part 17 be turned so as to bring the pointer say to 100, the parts will act the same, though, of course, the bloW-oif will not occur until that much greater pressure is reached. The stem or spindle 14 works freely in the bore of the part 17. I/Vhen the air escapes through the blow-off opening 24 it makes sufficient noise to notify the operator that the desired pressure has been reachedpand the tire sufficiently inflated. y

Modiiications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

I/Vhat is claimed as new is:-

An air valve comprising a body portiony through communicating with the longitudinal passage, a tube detachably mounted in said body portion with its bore in line with the longitudinal passage of the body portion and having a coupling swiveled thereon, a tubular portion detachably mounted on the opposite side of said body portion and having a blow-ofil opening, a head portion adjustably connected with said tubular portion, a spindle guided in said head, a disk carried by said spindle for closing the longitudinal passage of the body portion and controlling the blow-off opening, a spring in said tubular portion and bearing against the inner end of said head and against said disk, a pointer carried by said head and extending lengthwise of the tubular portion, said head being longitudinally adjustable independently of said spring and sv indle, and a stop rigid with the said tubu ar portion in the path of movement of said pointer for limiting the movement thereof.

In Witness whereof, I have hereunto set my hand this 4th day of May, 1907, in the presence of two subscribing witnesses.

VICTOR C. VVASHBURN Witnesses:

THOMAS WESTON, D. J. SULLIVAN. 

